/* ==========================================================================
   REALSweb.com - Modern Design System 2026
   Glassmorphism, Dark/Light Mode, Fluid Typography & High-Tech Aesthetics
   ========================================================================== */

/* --------------------------------------------------------------------------
   Design Tokens & CSS Variables
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette - Dark Theme (Default) */
  --bg-primary: #07090e;
  --bg-secondary: #0e121d;
  --bg-card: rgba(16, 22, 36, 0.65);
  --bg-card-hover: rgba(22, 31, 51, 0.85);
  --bg-card-solid: #111726;
  --border-color: rgba(255, 255, 255, 0.09);
  --border-highlight: rgba(0, 242, 254, 0.35);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-brand: #38bdf8;

  /* Accent Gradients & Glows */
  --accent-cyan: #00f2fe;
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --accent-violet: #a855f7;
  --accent-emerald: #10b981;
  
  --gradient-brand: linear-gradient(135deg, #00f2fe 0%, #4facfe 50%, #8b5cf6 100%);
  --gradient-glow: radial-gradient(circle at center, rgba(0, 242, 254, 0.12) 0%, rgba(139, 92, 246, 0.05) 50%, transparent 75%);
  --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.01) 100%);
  
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 12px 28px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 25px rgba(0, 242, 254, 0.25);
  --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.37);

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

  /* UI Sizing & Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --header-height: 76px;
  --container-max: 1200px;
  
  /* Modern CSS Color Scheme */
  color-scheme: dark;
}

/* Light Theme Overrides */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --bg-card-solid: #ffffff;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-highlight: rgba(14, 165, 233, 0.45);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-brand: #0284c7;

  --gradient-brand: linear-gradient(135deg, #0284c7 0%, #2563eb 50%, #7c3aed 100%);
  --gradient-glow: radial-gradient(circle at center, rgba(14, 165, 233, 0.12) 0%, rgba(124, 58, 237, 0.05) 50%, transparent 75%);
  --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.9) 0%, rgba(241, 245, 249, 0.8) 100%);
  
  --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 12px 28px rgba(15, 23, 42, 0.08);
  --shadow-glow: 0 0 25px rgba(14, 165, 233, 0.2);
  --shadow-card: 0 8px 32px 0 rgba(15, 23, 42, 0.08);

  color-scheme: light;
}

/* --------------------------------------------------------------------------
   Reset & Base Styles
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Ambient Cursor Light & Noise Background */
.cursor-ambient-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.08) 0%, rgba(139, 92, 246, 0.04) 40%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  will-change: transform;
  filter: blur(40px);
}

.bg-pattern-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, var(--border-color) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-color) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 85%);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

/* --------------------------------------------------------------------------
   Glassmorphism Cards & Surfaces
   -------------------------------------------------------------------------- */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
  pointer-events: none;
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-md), 0 0 20px rgba(0, 242, 254, 0.12);
}

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 100;
  transition: background-color 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}

.site-header.scrolled {
  background: rgba(7, 9, 14, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

[data-theme="light"] .site-header.scrolled {
  background: rgba(248, 250, 252, 0.9);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.brand-glyph {
  width: 38px;
  height: 38px;
  background: var(--gradient-brand);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1rem;
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.4);
}

.brand-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-text span {
  font-weight: 400;
  opacity: 0.8;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.35rem 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Language Toggle Button Group */
.lang-switcher {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 2px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.2s ease;
}

.lang-btn.active {
  background: var(--gradient-brand);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 242, 254, 0.3);
}

/* Theme Toggle Button */
.icon-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.icon-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-highlight);
  transform: translateY(-2px);
  color: var(--accent-cyan);
}

.theme-icon-sun, .theme-icon-moon {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

[data-theme="dark"] .theme-icon-sun {
  display: block;
}
[data-theme="dark"] .theme-icon-moon {
  display: none;
}

[data-theme="light"] .theme-icon-sun {
  display: none;
}
[data-theme="light"] .theme-icon-moon {
  display: block;
}

.mobile-menu-toggle {
  display: none;
}

.mobile-dropdown-menu {
  display: none;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  padding-top: calc(var(--header-height) + 3.5rem);
  padding-bottom: 5rem;
  position: relative;
  text-align: center;
}

.hero-badge-wrapper {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  color: var(--accent-emerald);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(10px);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  position: relative;
}

.pulse-dot::after {
  content: '';
  position: absolute;
  top: -4px;
  left: -4px;
  right: -4px;
  bottom: -4px;
  border-radius: 50%;
  border: 2px solid var(--accent-emerald);
  animation: pulse-ring 1.8s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.hero-title-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-role {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2vw, 1.35rem);
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

.hero-lead {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 780px;
  margin: 0 auto 3rem;
  line-height: 1.7;
}

/* Call to Action Buttons */
.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.85rem 1.75rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(0, 242, 254, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(0, 242, 254, 0.5);
  color: #ffffff;
}

.btn-secondary {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-highlight);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

.btn-ghost:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.btn-icon {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Hero Stats Ribbon */
.hero-stats-ribbon {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.stat-box {
  padding: 1.5rem 1rem;
  text-align: center;
}

.stat-number {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  font-family: var(--font-mono);
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  margin-bottom: 0.35rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   Section Common Styles
   -------------------------------------------------------------------------- */
.section {
  padding: 5rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3.5rem;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Expertise Cards Grid
   -------------------------------------------------------------------------- */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.75rem;
}

.expertise-card {
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card-icon-wrap {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: var(--accent-cyan);
  font-size: 1.5rem;
}

.expertise-card:nth-child(2) .card-icon-wrap {
  background: rgba(139, 92, 246, 0.08);
  border-color: rgba(139, 92, 246, 0.2);
  color: var(--accent-purple);
}

.expertise-card:nth-child(3) .card-icon-wrap {
  background: rgba(59, 130, 246, 0.08);
  border-color: rgba(59, 130, 246, 0.2);
  color: var(--accent-blue);
}

.expertise-card:nth-child(4) .card-icon-wrap {
  background: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.2);
  color: var(--accent-emerald);
}

.expertise-card:nth-child(5) .card-icon-wrap {
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.2);
  color: #f59e0b;
}

.expertise-card:nth-child(6) .card-icon-wrap {
  background: rgba(236, 72, 153, 0.08);
  border-color: rgba(236, 72, 153, 0.2);
  color: #ec4899;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Tech Stack Matrix Section
   -------------------------------------------------------------------------- */
.stack-controls {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.stack-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.stack-filter-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.2s ease;
}

.stack-filter-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-highlight);
}

.stack-filter-btn.active {
  background: var(--gradient-brand);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(0, 242, 254, 0.35);
}

.stack-search-wrap {
  max-width: 480px;
  margin: 0 auto;
  width: 100%;
  position: relative;
}

.stack-search-input {
  width: 100%;
  padding: 0.75rem 1.25rem 0.75rem 2.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.stack-search-input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.25);
}

.stack-search-icon {
  position: absolute;
  left: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  width: 18px;
  height: 18px;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
}

.tech-card {
  padding: 1.35rem;
}

.tech-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.tech-icon {
  font-size: 1.4rem;
}

.tech-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

.tech-badge-web {
  background: rgba(56, 189, 248, 0.15);
  color: #38bdf8;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.tech-badge-embedded {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.tech-badge-systems {
  background: rgba(168, 85, 247, 0.15);
  color: #a855f7;
  border: 1px solid rgba(168, 85, 247, 0.3);
}

.tech-badge-mobile {
  background: rgba(244, 63, 94, 0.15);
  color: #f43f5e;
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.tech-badge-db {
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.tech-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.tech-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: 1rem;
}

.hidden {
  display: none !important;
}

/* --------------------------------------------------------------------------
   Engineering Philosophy Section
   -------------------------------------------------------------------------- */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
}

.principle-card {
  padding: 2.25rem;
}

.principle-number {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-muted);
  opacity: 0.4;
  margin-bottom: 0.75rem;
}

.principle-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
}

.principle-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Contact Hub & Digital Business Card Section
   -------------------------------------------------------------------------- */
.contact-hub-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2.5rem;
  align-items: start;
}

/* Contact Details Cards */
.contact-details-col {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-card {
  padding: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.contact-info-left {
  display: flex;
  align-items: center;
  gap: 1.15rem;
}

.contact-icon-bubble {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--bg-card-solid);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 1.25rem;
}

.contact-meta-title {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.15rem;
}

.contact-meta-val {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.action-chip-btn {
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.25);
  color: var(--accent-cyan);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.action-chip-btn:hover {
  background: var(--accent-cyan);
  color: #07090e;
  box-shadow: 0 0 14px rgba(0, 242, 254, 0.4);
}

.vcard-download-card {
  padding: 1.75rem;
  background: linear-gradient(145deg, rgba(0, 242, 254, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
  border: 1px solid rgba(0, 242, 254, 0.3);
  text-align: center;
}

.vcard-download-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.vcard-download-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

/* Contact Form */
.contact-form-col {
  padding: 2.5rem;
}

.form-group {
  margin-bottom: 1.35rem;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.45rem;
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: 0.85rem 1.15rem;
  background: var(--bg-card-solid);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 14px rgba(0, 242, 254, 0.2);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-actions {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.form-secondary-action {
  text-align: center;
}

.mailto-text-link {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: underline;
  cursor: pointer;
  background: none;
  border: none;
  font-family: var(--font-sans);
}

.mailto-text-link:hover {
  color: var(--accent-cyan);
}

.alert {
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-top: 1rem;
}

.alert-success {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #10b981;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 0;
  margin-top: 5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-brand {
  font-weight: 700;
  color: var(--text-primary);
}

.footer-link {
  color: var(--text-secondary);
}

.footer-link:hover {
  color: var(--accent-cyan);
}

/* --------------------------------------------------------------------------
   Floating Back to Top & Toast Notifications
   -------------------------------------------------------------------------- */
#goto-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--gradient-brand);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
  transition: all 0.3s ease;
  box-shadow: 0 4px 18px rgba(0, 242, 254, 0.4);
  z-index: 90;
  border: none;
}

#goto-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

#goto-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 242, 254, 0.6);
}

.toast-container {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  pointer-events: none;
}

.toast-bubble {
  background: rgba(14, 18, 29, 0.95);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-highlight);
  color: #f1f5f9;
  padding: 0.75rem 1.4rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 15px rgba(0, 242, 254, 0.3);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  opacity: 0;
  transform: translateY(20px) scale(0.95);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="light"] .toast-bubble {
  background: rgba(255, 255, 255, 0.95);
  color: #0f172a;
  border-color: rgba(14, 165, 233, 0.4);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15), 0 0 15px rgba(14, 165, 233, 0.2);
}

.toast-bubble.show {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* --------------------------------------------------------------------------
   Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
  .contact-hub-wrapper {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .mobile-dropdown-menu {
    display: none;
    flex-direction: column;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: var(--bg-card-solid);
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    z-index: 99;
    gap: 1rem;
  }

  .mobile-dropdown-menu.open {
    display: flex;
  }

  .mobile-nav-link {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
  }

  .mobile-nav-link:last-child {
    border-bottom: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .hero-stats-ribbon {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .expertise-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}